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/*
* This file is part of the libusbhost library
* hosted at http://github.com/libusbhost/libusbhost
*
* Copyright (C) 2015 Amir Hammad <amir.hammad@hotmail.com>
*
*
* libusbhost is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "usart_helpers.h" /// provides LOG_PRINTF macros used for debugging
#include "usbh_hubbed.h" /// provides usbh_init() and usbh_poll()
#include "usbh_lld_stm32f4.h" /// provides low level usb host driver for stm32f4 platform
#include "usbh_driver_hid_mouse.h" /// provides usb device driver Human Interface Device - type mouse
#include "usbh_driver_hub.h" /// provides usb full speed hub driver (Low speed devices on hub are not supported)
#include "usbh_driver_gp_xbox.h" /// provides usb device driver for Gamepad: Microsoft XBOX compatible Controller
// STM32f407 compatible
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/usart.h>
#include <libopencm3/stm32/timer.h>
#include <libopencm3/stm32/otg_hs.h>
#include <libopencm3/stm32/otg_fs.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
static inline void delay_ms_busy_loop(uint32_t ms)
{
volatile uint32_t i;
for (i = 0; i < 14903*ms; i++);
}
/* Set STM32 to 168 MHz. */
static void clock_setup(void)
{
rcc_clock_setup_hse_3v3(&hse_8mhz_3v3[CLOCK_3V3_168MHZ]);
// GPIO
rcc_periph_clock_enable(RCC_GPIOA); // OTG_FS + button
rcc_periph_clock_enable(RCC_GPIOB); // OTG_HS
rcc_periph_clock_enable(RCC_GPIOC); // USART + OTG_FS charge pump
rcc_periph_clock_enable(RCC_GPIOD); // LEDS
// periphery
rcc_periph_clock_enable(RCC_USART6); // USART
rcc_periph_clock_enable(RCC_OTGFS); // OTG_FS
rcc_periph_clock_enable(RCC_OTGHS); // OTG_HS
rcc_periph_clock_enable(RCC_TIM6); // TIM6
}
/*
* setup 10kHz timer
*/
static void tim6_setup(void)
{
timer_reset(TIM6);
timer_set_prescaler(TIM6, 8400 - 1); // 84Mhz/10kHz - 1
timer_set_period(TIM6, 65535); // Overflow in ~6.5 seconds
timer_enable_counter(TIM6);
}
static uint32_t tim6_get_time_us(void)
{
uint32_t cnt = timer_get_counter(TIM6);
// convert to 1MHz less precise timer value -> units: microseconds
uint32_t time_us = cnt * 100;
return time_us;
}
static void gpio_setup(void)
{
/* Set GPIO12-15 (in GPIO port D) to 'output push-pull'. */
gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT,
GPIO_PUPD_NONE, GPIO12 | GPIO13 | GPIO14 | GPIO15);
/* Set */
gpio_mode_setup(GPIOC, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO0);
gpio_clear(GPIOC, GPIO0);
// OTG_FS
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO11 | GPIO12);
gpio_set_af(GPIOA, GPIO_AF10, GPIO11 | GPIO12);
// OTG_HS
gpio_mode_setup(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO15 | GPIO14);
gpio_set_af(GPIOB, GPIO_AF12, GPIO14 | GPIO15);
// USART TX
gpio_mode_setup(GPIOC, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO6 | GPIO7);
gpio_set_af(GPIOC, GPIO_AF8, GPIO6 | GPIO7);
// button
gpio_mode_setup(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO0);
}
static const usbh_dev_driver_t *device_drivers[] = {
&usbh_hub_driver,
&usbh_hid_mouse_driver,
&usbh_gp_xbox_driver,
0
};
static void gp_xbox_update(uint8_t device_id, gp_xbox_packet_t packet)
{
(void)device_id;
(void)packet;
LOG_PRINTF("update %d: %d %d \n", device_id, packet.axis_left_x, packet.buttons & GP_XBOX_BUTTON_A);
}
static void gp_xbox_connected(uint8_t device_id)
{
(void)device_id;
LOG_PRINTF("connected %d", device_id);
}
static void gp_xbox_disconnected(uint8_t device_id)
{
(void)device_id;
LOG_PRINTF("disconnected %d", device_id);
}
static const gp_xbox_config_t gp_xbox_config = {
.update = &gp_xbox_update,
.notify_connected = &gp_xbox_connected,
.notify_disconnected = &gp_xbox_disconnected
};
static void mouse_in_message_handler(uint8_t device_id, const uint8_t *data)
{
(void)device_id;
(void)data;
// print only first 4 bytes, since every mouse should have at least these four set.
// Report descriptors are not read by driver for now, so we do not know what each byte means
LOG_PRINTF("MOUSE EVENT %02X %02X %02X %02X \n", data[0], data[1], data[2], data[3]);
}
static const hid_mouse_config_t mouse_config = {
.mouse_in_message_handler = &mouse_in_message_handler
};
int main(void)
{
clock_setup();
gpio_setup();
// provides time_curr_us to usbh_poll function
tim6_setup();
#ifdef USART_DEBUG
usart_init(USART6, 921600);
#endif
LOG_PRINTF("\n\n\n\n\n###################\nInit\n");
/**
* device driver initialization
*
* Pass configuration struct where the callbacks are defined
*/
hid_mouse_driver_init(&mouse_config);
hub_driver_init();
gp_xbox_driver_init(&gp_xbox_config);
gpio_set(GPIOD, GPIO13);
/**
* Pass array of supported low level drivers
* In case of stm32f407, there are up to two supported OTG hosts on one chip.
* Each one can be enabled or disabled in config.mk - optimization for speed
*
* Pass array of supported device drivers
*/
usbh_init(usbh_lld_stm32f4_drivers, device_drivers);
gpio_clear(GPIOD, GPIO13);
LOG_PRINTF("USB init complete\n");
LOG_FLUSH();
while (1) {
// set busy led
gpio_set(GPIOD, GPIO14);
uint32_t time_curr_us = tim6_get_time_us();
usbh_poll(time_curr_us);
// clear busy led
gpio_clear(GPIOD, GPIO14);
LOG_FLUSH();
// approx 1ms interval between usbh_poll()
delay_ms_busy_loop(1);
}
return 0;
}
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